08-19-2016, 04:02 AM
I will see if I can find the paperwork I gathered for the 46-1201, and see if it has any notes for the Code 26 version, if I do find it I will scan it. A fellow on the alternative forum named Tom Albrecht sent this stuff to me since he restored a 46-1201 shortly before I began working on mine. I'm a bit foggy on this right now but I seem to remember that most of the changes were related to the power supply, the audio amp, and the tube lineup of same, not in the mixer-oscillator circuit which all seem to use the 7A8.
One problem I never resolved in my set is that I could not peak the IF alignment without the set motorboating, and when I adjusted it so it would not motorboat the dial would not track. I played around with that bypass cap-choke combo and it didn't really help much, if anything it worked better with the choke shorted out (my set had the RF choke wound on a proper form rather then just wrapping hookup wire around the capacitor body. In any event I got sick of playing around with it, and since the mercury switch for the phonograph did not work, and the cartridge was dead, I put the set back into drydock and moved on with other projects. I have a theory that my set may have been a dog when it left the factory, because the last time I had a set behave this way it was when I accidentally crossed the secondary and primary leads of an IF transformer together in a 42-327 whilst replacing them, I may investigate whether this was the case in my Bing Crosby.
Regards
Arran
One problem I never resolved in my set is that I could not peak the IF alignment without the set motorboating, and when I adjusted it so it would not motorboat the dial would not track. I played around with that bypass cap-choke combo and it didn't really help much, if anything it worked better with the choke shorted out (my set had the RF choke wound on a proper form rather then just wrapping hookup wire around the capacitor body. In any event I got sick of playing around with it, and since the mercury switch for the phonograph did not work, and the cartridge was dead, I put the set back into drydock and moved on with other projects. I have a theory that my set may have been a dog when it left the factory, because the last time I had a set behave this way it was when I accidentally crossed the secondary and primary leads of an IF transformer together in a 42-327 whilst replacing them, I may investigate whether this was the case in my Bing Crosby.
Regards
Arran
